Nathanael said to Jesus, “How do You know [these things about] me?” Jesus answered, “Before Philip called you, when you were still under the fig tree, I saw you.” John 1:48, The Amplified Bible
Hebrews: 12 For the word of God is living and active, and sharper than any two-edged sword, even penetrating as far as the division of soul and spirit, of both joints and marrow, and able to judge the thoughts and intentions of the heart. 13 And there is no creature hidden from His sight, but all things are open and laid bare to the eyes of Him to whom we must answer.
When Jesus said that he saw Nath under the fig tree, he obviously did not mean that physically; he saw inside the Nath's heart. let us look at Hebrews 4:12-13; 12 God's word iss alive and working and is sharper than a double-edged sword. It cuts all the way into us, where the soul and the spirit are joined, to the center of our joints and bones.
For the word of God is living and active, and sharper than any two-edged sword, even penetrating as far as the division of soul and spirit, of both joints and marrow, and able to judge the thoughts and intentions of the heart. 13 And there is no creature hidden from His sight, but all things are open and laid bare to the eyes of Him to whom we must answer.